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Model Penal Code § 5.01

Model Penal Code § 5.01 is the attempt provision in Criminal Law. It says a person can be liable for attempt when they intend a crime and take a substantial step toward it, not just prepare.

Last updated July 2026

What is Model Penal Code § 5.01?

Model Penal Code § 5.01 is the Criminal Law rule that turns an unfinished crime into attempt liability. The core idea is simple: you do not need the completed offense, but you do need proof that the defendant meant to commit it and moved far enough toward it to cross the line from planning into punishable conduct.

The MPC uses the phrase substantial step for that line. A substantial step is an act that strongly confirms the person’s criminal purpose, like scouting a target, buying tools for the offense, lying in wait, or going to the scene with everything needed to carry it out. The point is not just that the act looks suspicious. The act has to corroborate the intent to commit the target crime.

That makes § 5.01 different from a vague “bad idea” standard. Criminal Law does not punish someone just for thinking about a crime or making ordinary preparations that could still be abandoned for innocent reasons. Under the MPC, the prosecution has to connect the conduct to a specific offense and show that the defendant had the purpose to bring that offense about.

This is why attempt is treated as an inchoate offense. The harm is not the completed crime, but the dangerous move toward it. Courts using the MPC framework focus on what the defendant did, how close it came to completion, and whether the conduct clearly points to criminal intent rather than innocent preparation.

A useful example is someone who buys a gun, drives to a victim’s house, and waits outside with a plan to shoot. Under § 5.01, those facts can support attempt because they are not just preparatory in the abstract. They line up with the intended offense and strongly corroborate the criminal purpose.

One more thing to keep straight: the target crime does not have to succeed. If something outside the defendant’s control stops the offense, attempt liability can still attach as long as the intent and substantial step are there. That is what makes § 5.01 such a common framework in Criminal Law classes, because it shows how the law punishes dangerous movement before the final harm happens.

Why Model Penal Code § 5.01 matters in Criminal Law

Model Penal Code § 5.01 matters because it is the cleanest way to see how Criminal Law handles unfinished wrongdoing. It sits right at the boundary between harmless preparation and punishable attempt, which is a boundary professors love to test with fact patterns.

This section also gives you the language to analyze cases where someone has clearly started down the road to a crime but has not finished it. Instead of asking only whether the act was close to completion, you ask two separate questions: did the person have the required mens rea, and did they take a substantial step that strongly points to that intent?

That structure shows up in rule statements, issue spotting, and case analysis. If a hypothetical includes tools, surveillance, travel to the scene, or waiting for the right moment, those facts may matter not because they are dramatic, but because they make the defendant’s purpose more believable under the MPC.

It also helps you distinguish attempt from mere preparation, which is one of the most common mistakes in Criminal Law. Students often want to call anything suspicious an attempt. § 5.01 gives you a more disciplined way to write the answer: identify the target offense, identify the intent, and then explain why the conduct is or is not a substantial step.

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How Model Penal Code § 5.01 connects across the course

Substantial Step

This is the conduct part of MPC attempt liability. § 5.01 uses substantial step to separate ordinary preparation from acts that strongly confirm criminal purpose. When you see facts like scouting, lying in wait, or possessing special tools, you are usually asking whether the conduct crosses into this category.

Mens Rea

Attempt under § 5.01 is not just about what someone did, it also depends on what they meant to do. The prosecution has to show intent for the target crime, usually a purposeful state of mind. That makes mens rea the mental side of the attempt analysis.

Inchoate Offense

Attempt is an inchoate offense because the law punishes conduct before the final crime is completed. § 5.01 is one of the main rules you use when a fact pattern shows a crime that was started but not finished. It sits alongside solicitation and conspiracy in the broader inchoate crimes unit.

Impossibility Doctrine

Section 5.01 becomes easier to analyze when a case raises impossibility. The MPC is less forgiving of claims that the crime could not happen if the defendant still had the required intent and took a substantial step. That means the focus stays on the defendant’s conduct and purpose, not just on whether completion was actually possible.

Is Model Penal Code § 5.01 on the Criminal Law exam?

A fact-pattern question usually asks you to decide whether the defendant committed attempt or only made preparation. Your move is to state the MPC rule, then apply the two parts separately: intent plus substantial step. Look for concrete acts that corroborate the criminal plan, like waiting at the scene, buying crime-specific tools, or taking steps that point to one target offense. If the facts show the crime was interrupted before completion, do not stop there. Explain that § 5.01 can still support liability even when the offense was not finished, as long as the conduct went beyond planning. In a short-answer or essay response, the strongest answers name the target crime, identify the mens rea, and tie the facts to the substantial step standard rather than just saying the conduct was suspicious.

Model Penal Code § 5.01 vs Dangerous Proximity Test

These are both attempt standards, but they ask different questions. The Dangerous Proximity Test looks at how close the defendant came to completing the crime, while Model Penal Code § 5.01 focuses on whether there was a substantial step that strongly corroborates intent. The MPC is usually more defendant-specific and less tied to last-minute proximity alone.

Key things to remember about Model Penal Code § 5.01

  • Model Penal Code § 5.01 is the Criminal Law rule for attempt liability, not for completed crimes.

  • You need both intent to commit the target offense and a substantial step toward that offense.

  • The substantial step must strongly corroborate the person’s criminal purpose, not just look odd in hindsight.

  • Mere preparation is not enough, even if the defendant has already done several suspicious things.

  • The MPC can still treat the conduct as attempt even when the crime was interrupted or impossible to complete.

Frequently asked questions about Model Penal Code § 5.01

What is Model Penal Code § 5.01 in Criminal Law?

It is the MPC provision that defines attempt liability. A person can be guilty if they intend to commit a crime and take a substantial step toward it. The section is used to tell the difference between punishable attempt and mere preparation.

What counts as a substantial step under § 5.01?

A substantial step is conduct that strongly confirms the defendant’s criminal intent. Examples can include lying in wait, going to the target location with the needed tools, or taking action that would normally lead straight into the crime. The exact answer depends on the facts, not a fixed checklist.

How is Model Penal Code § 5.01 different from the Dangerous Proximity Test?

The Dangerous Proximity Test focuses on how close the defendant came to finishing the crime. Section 5.01 focuses more on whether the defendant took a substantial step that clearly shows intent. That makes the MPC approach easier to apply when the facts show strong evidence of purpose but the crime was still interrupted.

Can someone be liable for attempt even if the crime could not be completed?

Yes, under the MPC framework, impossibility does not automatically defeat attempt if the defendant had the required intent and took a substantial step. The law cares about the defendant’s criminal purpose and conduct, not just whether the final harm actually happened.

Model Penal Code § 5.01 | Criminal Law | Fiveable